US11228181B2 - Method for controlling the power of a system, and device for controlling the power of a system - Google Patents

Method for controlling the power of a system, and device for controlling the power of a system Download PDF

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Publication number
US11228181B2
US11228181B2 US14/904,301 US201414904301A US11228181B2 US 11228181 B2 US11228181 B2 US 11228181B2 US 201414904301 A US201414904301 A US 201414904301A US 11228181 B2 US11228181 B2 US 11228181B2
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Prior art keywords
power
inverter
electric
controller
energy storage
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US14/904,301
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US20160134119A1 (en
Inventor
Harald Budzen
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SEW Eurodrive GmbH and Co KG
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SEW Eurodrive GmbH and Co KG
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    • H02J3/383—
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/28—Arrangements for balancing of the load in a network by storage of energy
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381—Dispersed generators
    • H02J3/382—
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/388—Islanding, i.e. disconnection of local power supply from the network
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/40—Synchronising a generator for connection to a network or to another generator
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
    • H02J3/466—Scheduling the operation of the generators, e.g. connecting or disconnecting generators to meet a given demand
    • H02J3/472—For selectively connecting the AC sources in a particular order, e.g. sequential, alternating or subsets of sources
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20—The dispersed energy generation being of renewable origin
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20—The dispersed energy generation being of renewable origin
    • H02J2300/22—The renewable source being solar energy
    • H02J2300/24—The renewable source being solar energy of photovoltaic origin
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
    • H02J2310/10—The network having a local or delimited stationary reach
    • H02J2310/12—The local stationary network supplying a household or a building
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/56—Power conversion systems, e.g. maximum power point trackers

Definitions

  • the present invention relates to a method for controlling the power of a system and to a device for controlling the power of a system.
  • the system having an electric energy source, electric consumers, an energy storage, an inverter, and a charge controller
  • the system is connected to the in particular public AC electric power supply via an interconnected power sensor
  • the power sensor may be used for ascertaining the power withdrawn by the system from the in particular public AC electric power supply, or for ascertaining a corresponding quantity, such as the active power withdrawn from the in particular public AC electric power supply
  • the sensor signal is transmitted to a controller, which regulates the power withdrawn from the in particular public AC electric power supply toward zero by an appropriate actuation of the inverter and the charge controller.
  • an energy storage is chargeable, and the in particular public AC electric power supply is not used for the supply.
  • the energy source is a photovoltaic system or some other regenerative energy source such as wind power.
  • the energy source is volatile, i.e., intermittently generates high power and intermittently low or no power. Buffering by means of the energy storage is therefore able to be implemented, so that a low energy withdrawal from the in particular public AC power supply is required despite the volatility of the energy source.
  • inverters and charge controllers are activated alternatively.
  • This has the advantage that energy from the energy storage in the form of an AC voltage can be provided for the consumers with the aid of the inverter.
  • the inverter may be designed in such a way that it supplies a single-phase or also a three-phased AC voltage at its AC-side terminal.
  • the alternatively activatable charge controller controls the charging of the energy storage and is able to be supplied from the alternating current of the system that is generated photovoltaically.
  • the charge control takes place either according to a CV method or a CC method.
  • the controller controls the charge controller in such a way that excess power is routed to the energy store and only power that is in excess thereof is fed into the in particular public AC electric power supply, the inverter in particular being switched into a quiescent state, deactivated and/or switched off beforehand by the controller.
  • the controller controls the inverter in such a way that the consumers are supplied with power from the energy storage, the controller in particular switching the charge controller into a quiescent state, deactivates and/or switches it off beforehand, in particular only the electric power required in excess thereof being withdrawn from the in particular public AC electric power supply.
  • the controller has a filter, and/or an ON-delay means is situated in the control path from the controller to the charge controller and/or inverter.
  • a hysteresis is taken into account when actuating the charge controller and/or inverter. This is advantageous insofar as resonant vibrations of the system can be prevented.
  • a signal electronics system of the inverter in particular a signal electronics system situated in the housing of the inverter, implements a charge control for the energy storage. This is advantageous because no additional signal electronics are required.
  • a sensor for detecting a temperature of the energy storage is provided, and the sensor signal is supplied to a signal electronics system of the inverter, so that a temperature-dependent charge control is able to be realized for the energy storage.
  • the signal electronics system preferably includes a memory in which data, parameters and programs are storable and are able to be implemented with the aid of the signal electronics system, in particular its microcontroller.
  • the microcontroller also assumes the charge management in order to generate the pulse-width-modulated actuating signals of the inverter.
  • the system encompasses an electric energy source, an electric consumer, an energy storage, an inverter, and a charge controller
  • a power sensor is interconnected between the system and the in particular public AC electric power supply, and the power sensor in particular can be used for ascertaining the power withdrawn by the system from the in particular AC supply network, or for ascertaining a corresponding quantity, such as the active power withdrawn from the in particular public AC electric power supply
  • the sensor signal i.e., in particular the signal from the power sensor, is supplied to a controller, in particular a housing situated in the signal electronics system, which controls the power withdrawn from the in particular public AC electric energy supply towards zero by appropriate control of the inverter and/or the charge controller via a control path.
  • control path from the direction of the controller has a selector switch, so that either the inverter or the charge controller is activated, in particular a hysteresis being provided during the actuation, in particular an ON-delay means being situated in the control path from the controller to the charge controller and/or inverter.
  • a signal electronics system of the inverter is situated inside the housing of the inverter. This is advantageous insofar as no further signal electronics system is required, but a standard voltage-controllable frequency inverter may be used instead.
  • the frequency inverter includes means for detecting the output current.
  • a sensor for detecting a temperature of the energy storage is provided, and the sensor signal is supplied to a signal electronics system of the inverter, so that a temperature-dependent charge control is able to be implemented for the energy storage.
  • the signal electronics system is able to implement the charge management, in particular taking the temperature of the energy storage into account, in addition to the control and generation of the actuating signals for the inverter.
  • a means for limiting the current is additionally provided in integrated form in the signal electronics system.
  • the FIGURE illustrates a schematic structure of a system according to the present invention.
  • a direct current is generated, the direct current being supplied to an inverter 2 , which generates an alternating voltage.
  • An input counter 3 which detects the electric energy made available, is situated at the output of inverter 2 .
  • Consumers 4 in particular a washing machine, a refrigerator, an electric automobile, are supplyable at the output of the inverter.
  • Inverter 2 synchronizes the voltage it has generated to the voltage of the in particular public AC electric power supply 10 .
  • a four-quadrant energy counter 9 is situated between the in particular public AC electric power supply 10 and the output of inverter 2 and/or input counter 3 . Utilizing this four-quadrant energy counter 9 , it is therefore detectable whether an energy withdrawal from the in particular public AC electric power supply 10 or an energy supply to the in particular public AC electric power supply 10 is taking place. In other words, the direction of the energy flow from the system into the in particular public AC electric power supply 10 or from the in particular public AC electric power supply 10 into the system is detected.
  • a switch S is actuated, which activates either a charge controller 5 , especially including a rectifier, or an inverter 6 .
  • Charge controller 5 supplies energy storage 7 with current injected by inverter 2 in order to charge it, provided it is activated.
  • inverter 6 When inverter 6 is activated, energy storage 7 is discharged by supplying the DC-side terminal of inverter 6 from there. At its AC voltage output, inverter 6 supplies the system, i.e., especially the consumers, with an alternating voltage. This makes it possible to supply the consumers from energy storage 7 via inverter 6 , and the withdrawal from the in particular public AC electric energy supply 10 is kept to a minimum.
  • the power, especially the effective power, withdrawn by the system from the in particular public supply 10 is detected with the aid of the four-quadrant energy counter 9 , in particular the active power sensor; it is supplied as actual value to a controller, which regulates this actual value to the setpoint value of zero by appropriate actuation of control 8 of switch S.
  • the excess energy is supplied predominantly into energy storage 7 . Only when energy storage 7 has been charged and if excess photovoltaically generated energy is still available, will this energy be injected into the in particular public AC electric power supply 10 .
  • the charge controller has an inverter which is actuated in a pulse-width modulated manner, the inverter's DC-side terminal being supplied by a rectifier of the charge controller.
  • the AC-voltage-side output of the inverter is rectified by a further rectifier and charge voltage is thus provided to the energy storage. This makes it possible to detect the charge current and the charge voltage with the aid of the charge controller using its respective sensors, and energy storage 7 is charged to the maximum charge power.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Supply And Distribution Of Alternating Current (AREA)
US14/904,301 2013-07-09 2014-06-12 Method for controlling the power of a system, and device for controlling the power of a system Active 2036-06-30 US11228181B2 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE102013011384 2013-07-09
DE102013011384.9 2013-07-09
DE102014003054.7 2014-03-10
DE102014003054.7A DE102014003054B4 (de) 2013-07-09 2014-03-10 Verfahren zur Leistungsregelung eines Systems und Vorrichtung zur Leistungsregelung eines Systems
PCT/EP2014/001595 WO2015003771A1 (de) 2013-07-09 2014-06-12 Verfahren zur leistungsregelung eines energiesystems und vorrichtung zur leistungsregelung desselben

Publications (2)

Publication Number Publication Date
US20160134119A1 US20160134119A1 (en) 2016-05-12
US11228181B2 true US11228181B2 (en) 2022-01-18

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US14/904,301 Active 2036-06-30 US11228181B2 (en) 2013-07-09 2014-06-12 Method for controlling the power of a system, and device for controlling the power of a system

Country Status (4)

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US (1) US11228181B2 (de)
EP (1) EP3020115B1 (de)
DE (1) DE102014003054B4 (de)
WO (1) WO2015003771A1 (de)

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Publication number Priority date Publication date Assignee Title
DE202021002165U1 (de) 2021-06-23 2021-08-10 Alexander Mlynek Waschmaschine mit Leistungsanpassung zur Eigenverbrauchsmaximierung bei lokaler regenerativer Stromerzeugung
DE202021002540U1 (de) 2021-08-01 2021-08-25 Alexander Mlynek Geschirrspülmaschine mit Leistungsanpassung zur Eigenverbrauchsmaximierung bei lokaler regenerativer Stromerzeugung
DE102021122489A1 (de) 2021-08-31 2023-03-02 Viessmann Climate Solutions Se Verfahren zum betreiben eines energiesystems
DE102022134315A1 (de) 2022-12-21 2024-06-27 Insta Gmbh Grundlastmodul zum Betreiben eines Solarenergiesystems, Solarenergiesystem und Verfahren zum Betreiben eines Solarenergiesystems

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Also Published As

Publication number Publication date
US20160134119A1 (en) 2016-05-12
DE102014003054A1 (de) 2015-01-15
EP3020115A1 (de) 2016-05-18
EP3020115B1 (de) 2019-10-02
DE102014003054B4 (de) 2022-03-17
WO2015003771A1 (de) 2015-01-15

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